initial commit

Signed-off-by: Werner Macho <[email protected]>

dockerbackup.sh

@@ -0,0 +1,119 @@
+#!/bin/bash
+## 
+## Usage  : ./docker_backup.sh
+## Author : Werner Macho <[email protected]>
+##
+## Idea taken from   : http://blog.stefanxo.com/category/docker/
+##
+## Exports running docker containers
+##
+
+# Delete old backups? Any files older than $daystokeep will be deleted
+# Default option     : 0
+# Recommended option : 1
+purgeoldbackups=1
+
+# How many days should we keep the backups
+daystokeep="7"
+
+# This directory should have enough space to hold all docker containers
+# at the same time
+# Subdirectories will be automatically created and deleted after finish
+backupdir="/tmp"
+
+echo -e ""
+echo -e "\e[1;31mBackup Docker\e[00m"
+echo -e "\e[1;33m"$(date)"\e[00m"
+echo -e ""
+
+# Timestamp (sortable AND readable)
+stamp=`date +"%Y_%m_%d"`
+
+# List all running docker instances
+instances=`docker ps -q --no-trunc` 
+
+exportdir="$backupdir/docker"
+if `test -d ${exportdir}`; then
+    echo -e "Backupfolder is already there, skipping creation"
+else
+    mkdir ${exportdir}
+fi
+
+if [[ $# -eq 0 ]] ; then
+# Loop the instances
+    for container in ${instances}; do
+        # Get info on each Docker container
+        instancename=`docker inspect --format='{{.Name}}' ${container} | tr '/' '_'`
+        imagename=`docker inspect --format='{{.Config.Image}}' ${container} | tr '/' '_'`
+
+        # Define our filenames
+        filename="$stamp-$instancename-$imagename.docker.tar.gz"
+        exportfile="$exportdir/$filename"
+
+        # Feedback
+        echo -e "backing up \e[1;36m$container\e[00m"
+        echo -e " container \e[1;36m$instancename\e[00m"
+        echo -e " from image \e[1;36m$imagename\e[00m"
+
+        # Dump and gzip
+        echo -e " creating \e[0;35m$exportfile\e[00m"
+        docker export "$container" | gzip -c > "$exportfile"
+
+    done;
+else
+    didBackup=false
+    for container in ${instances}; do
+        # Get info on each Docker container
+        instancename=`docker inspect --format='{{.Name}}' ${container} | tr '/' '_'`
+        imagename=`docker inspect --format='{{.Config.Image}}' ${container} | tr '/' '_'`
+
+        if [[ ${instancename} == _$1 ]] ; then
+            # Define our filenames
+            filename="$stamp-$instancename-$imagename.docker.tar.gz"
+            exportfile="$exportdir/$filename"
+
+            # Feedback
+            echo -e "backing up \e[1;36m$container\e[00m"
+            echo -e " container \e[1;36m$instancename\e[00m"
+            echo -e " from image \e[1;36m$imagename\e[00m"
+
+            # Dump and gzip
+            echo -e " creating \e[0;35m$exportfile\e[00m"
+            docker export "$container" | gzip -c > "$exportfile"
+            didBackup=true
+        fi
+    done;
+    if ! ${didBackup} ; then
+        echo -e "Given name not found in list of available Containers"
+        exit 1
+    fi
+fi
+
+# Purge old backups
+
+if [[ "$purgeoldbackups" -eq "1" ]]
+then
+    echo -e " \e[1;35mRemoving old backups...\e[00m"
+    olderThan=`date -d "$daystokeep days ago" +%s`
+    curDate=`date +%s`
+
+    ls ${exportdir} | while read -r line;
+    do
+        fileDate=`stat -L --format %Y $exportdir/${line}`
+        #echo -e $fileDate
+        fileAge=`expr $curDate - $fileDate`
+        #echo -e $fileAge
+        if [[ ${fileDate} -lt ${olderThan} ]]
+        then
+            fileName=`echo ${line}`
+            echo -e " Removing outdated backup \e[1;31m$fileName\e[00m"
+            if [[ ${fileName} != "" ]]
+            then
+                rm "$fileName"
+            fi
+        fi
+    done;
+fi
+
+# We're done
+echo -e "\e[1;32mDocker Backup done!\e[00m"